Mineralogy Database

Murunskite Mineral Data

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General Murunskite Information

Help on Chemical  Formula: Chemical Formula: K2Cu3FeS4
Help on Composition: Composition: Molecular Weight = 452.95 gm
   Potassium  17.26 %  K
   Iron       12.33 %  Fe
   Copper     42.09 %  Cu
   Sulfur     28.32 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: K2Cu3Fe2+S4
Help on Environment: Environment: In rocks that have undergone intensive potassium metasomatism.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Murunskii massif, between the Charo and Tokko Rivers, Olekminsk, Aldan, Yakutia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Murunskite + Pronunciation Say MURUNSKITE
Help on Synonym: Synonym: ICSD 75578
  PDF 33-1005

Murunskite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.37628
Help on Cell Dimensions: Cell Dimensions: a = 3.88, c = 13.1, Z = 1; V = 197.21 Den(Calc)= 3.81
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.52(1), 2.53(0.8), 2.9(0.6),

Physical Properties of Murunskite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Blue gray, Copper brown, Black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic

Optical Properties of Murunskite

Help on RL Anisotrophism: RL Anisotrophism: Moderate, gray to brownish gray white a bluish tint.
Help on RL Color: RL Color: Grayish orange cream.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Murunskite in Air
λ R  ∑ R(λ) 
 440 nm   15.00   
 460 nm   15.60 
 480 nm   16.60 
 500 nm   17.40 
 520 nm   18.20 
 540 nm   19.20 
 560 nm   20.00 
 580 nm   21.00 
 600 nm   21.80 
 620 nm   22.60 
 640 nm   23.30 
 660 nm   24.00 
 680 nm   24.60 
 700 nm   25.40 
Calculated Relative Intensity Colors of Murunskite in Air
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 550%

Calculated Properties of Murunskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Murunskite =3.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0047584522
Boson Index = 0.9952415478
Help on Photoelectric: Photoelectric: PEMurunskite = 25.74 barns/electron
U=PEMurunskite x relectron= 93.11 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 236.48 (Gamma Ray American Petroleum Institute Units)
Concentration of Murunskite per GRapi unit = 0.42 (%)

Estimated Radioactivity from Murunskite - barely detectable


Murunskite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.05)where Am Bn Xp, with (m+n):p=3:2
  (02.05.05)Thalcusite Group Thalcusite TlCu3FeS4 I 4/mmm 4/m 2/m 2/m Bukovite Tl2Cu3FeSe4 I 4/mmm 4/m 2/m 2/m Murunskite K2Cu3FeS4 I 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.BD.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BD -With Hg, Tl
02.BD.30 Bukovite Tl2Cu3FeSe4 I 4/mmm 4/m 2/m 2/m
02.BD.30 Murunskite K2Cu3FeS4 I 4/mmm 4/m 2/m 2/m
02.BD.30 Thalcusite TlCu3FeS4 I 4/mmm 4/m 2/m 2/m

Other Murunskite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Murunskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.BD.30





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